CAJ | 학술논문

在对实际电网关键断面选取特点进行归纳总结的基础上，提出了一种综合考虑多种电网安全主题的电网关键断面自动发现方法。该方法在电网拓扑结构和在线潮流状态的基础上，对电网进行电气分区，并根据不同的安全主题选择不同类型的关键断面：根据电网暂态安全主题的需要，选取分电气区间的联络线构成的长距离输电通道作为关键断面；根据电网热稳定安全主题，选取电压等级较高、传输功率大且相互间影响大的输电线构成的输电通道作为关键断面；根据负荷侧热稳定安全主题，选取电压等级较低、传输功率较大且相互间影响较大的输电线构成的输电通道作为关键断面。广东省电网算例测试结果表明：该方法准确考虑了电网中常见的安全主题，得到了不同种类的关键断面；关键断面结果不仅符合电网运行方式专家的给出的经验关键断面，也能够发现新的关键断面，结果具有合理可信。
재대실제전망관건단면선취특점진행귀납총결적기출상，제출료일충종합고필다충전망안전주제적전망관건단면자동발현방법。해방법재전망탁복결구화재선조류상태적기출상，대전망진행전기분구，병근거불동적안전주제선택불동류형적관건단면：근거전망잠태안전주제적수요，선취분전기구간적련락선구성적장거리수전통도작위관건단면；근거전망열은정안전주제，선취전압등급교고、전수공솔대차상호간영향대적수전선구성적수전통도작위관건단면；근거부하측열은정안전주제，선취전압등급교저、전수공솔교대차상호간영향교대적수전선구성적수전통도작위관건단면。광동성전망산례측시결과표명：해방법준학고필료전망중상견적안전주제，득도료불동충류적관건단면；관건단면결과불부부합전망운행방식전가적급출적경험관건단면，야능구발현신적관건단면，결과구유합리가신。
Based on summarizing the features of selecting critical flowgates in actual power grid, an automatic discovery method of power system critical flowgates considering multiple security themes in power grid is proposed. Based on topological structure of power grid and online power flow, the electric partitioning of power grid is performed and different types of critical flowgates are selected according to different security theme: according to the demand on transient security theme the long-distance transmission channel composed by tie line between electric partitionings is chosen as critical flowgate;according to the demand on thermal stability theme, the transmission channel composed of high voltage transmission lines with high transmission capacity, which interact each other obviously, is chosen as critical flowgate; according to the thermal stability at load side the transmission channel composed of low voltage transmission lines with higher transmission capacity, which interact each other obviously, is chosen as critical flowgate. Taking Guangdong power Grid in China as testing example, test results show that the proposed method considers common security themes in power grid accurately and different kinds of critical flowgates can be attained;the obtained critical flowgates not only conform to a posteriori critical flowgate given by experts in the field of power grid operation, and new critical flowgates can be discovered, besides, the discovery results are reasonable and creditable.